The Space Age SSU-MR-104/C/R is a four-position multi-voltage control relay assembly. It houses four independent SPDT relay modules in a red enclosure. Each module switches one circuit for fire alarm and building control systems. As a result, installers gain flexible switching from a single, compact unit.
Space Age SSU-MR-104/C/R relay features
Every position contains a red LED. This LED lights when the relay coil is energized. Therefore, technicians can verify operation visually, without metering. In addition, the modules snap apart from the four-position master and work independently.
Each module accepts one of four control voltages. Specifically, you can wire it for 24VDC, 24VAC, 120VAC, or 230VAC. The DC coil operates from 18 to 35VDC. Also, the DC inputs are polarized for correct connection.
Specifications
- Contact configuration: SPDT, dry Form “C”, one per position
- Module positions: four (snap-apart)
- Contact rating: 7A @ 28VDC, 10A @ 120VAC, 7A @ 230VAC
- Control voltages: 24VDC (18-35VDC), 24VAC, 120VAC, or 230VAC
- Energized indicator: one red LED per position
- Enclosure: red cover with LED viewing port; 1/2-inch conduit knockouts
- Wiring: solid or stranded, #14 to #22 AWG
- Listings: UL listed Control Unit Accessory; UUKL smoke control; MEA; CSFM
Applications
This relay suits fire alarm, HVAC, security, and lighting control circuits. For example, it can drive HVAC shutdown or notification appliance circuits. However, do not run it continuously at 230VAC. Continuous duty applies at 24VAC, 24VDC, and 120VAC.
For more information, contact the Life Safety Consultants team at (888) 557-0558, or email us at: sales@lifesafetycom.com
Additional information
| Weight | 3.4 lbs |
|---|---|
| Dimensions | 12 × 7 × 3.5 in |
| Condition | New |
| Manufacturers | Securitron |
| Part Type | Replacement Part |






